Is this face topology good for animation?
You should avoid tris and ngons in your geometry, even if its a game model (its ok for mobile game models though - depends on polycount)



The meshflow is ok, its not good around the nostrils. Here is a good edgeflow that I recommend, its from a Zbrush course:



 Source: Zbrush workshop with Ryan Kingslien 
 Direct Source: Workshops with Ryan Kingslien 
 Probably the Anatomy Of The Face (no guarantee) 

You will know when you are ready for professional level, someone will just employ you. There are different levels among professionals too. Just practice and your confidence level will increase. You are basically ready when you know what you are doing.